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  proxy_temp_path  /nginx/cache/temp;

  proxy_cache_path /nginx/cache/path levels=1:2 keys_zone=cache_test:2048m inactive=7d max_size=10g;

......

 location ~ .(gif|jpg|jgep|png)$ {

    proxy_pass http://upstreams;

    proxy_ignore_headers X-Accel-Expires Expires Cache-Control Set-Cookie;

    proxy_cache cache_test;

    #设置缓存的key

    proxy_cache_key $host$uri$is_args$args;

    #设置状态码为200和304的响应可以进行缓存，并且缓存时间为1天

    proxy_cache_valid 200 304 1d;

    expires 30d;

  }

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proxy_ignore_headers X-Accel-Expires Expires Cache-Control Set-Cookie;